CAJ | 학술논문

为了深入认识与理解南北地震带北段和蒙古中部大陆强震孕育与发生的深部构造环境，在南北纵贯蒙古国全境的苏赫巴托尔-乌兰巴托-达兰扎达嘎德剖面上开展了大规模重磁测量及岩石样品采集。笔者系统地分析与总结了剖面上585块岩石样品的密度、磁化率和天然剩余磁化强度等物性参数。结果表明，整个剖面以火成岩为主，沉积岩为辅，仅有少量变质岩出露，且各岩石大类、类和亚类以及各年代地层之间，均存在着不同程度的密度与磁性差异。火成岩磁化率和天然剩余磁化强度分别具有3～5个数量级差异，密度变化范围较大；而沉积岩磁化率和天然剩余磁化强度相对较弱。一方面，物性差异为利用重磁测量开展剖面地壳结构的反演与研究奠定了基础；另一方面，这些物性参数为相关地球物理测量数据的反演与解释提供了重要约束。
위료심입인식여리해남북지진대북단화몽고중부대륙강진잉육여발생적심부구조배경，재남북종관몽고국전경적소혁파탁이-오란파탁-체란찰체알덕부면상개전료대규모중자측량급암석양품채집。필자계통지분석여총결료부면상585괴암석양품적밀도、자화솔화천연잉여자화강도등물성삼수。결과표명，정개부면이화성암위주，침적암위보，부유소량변질암출로，차각암석대류、류화아류이급각년대지층지간，균존재착불동정도적밀도여자성차이。화성암자화솔화천연잉여자화강도분별구유3～5개수량급차이，밀도변화범위교대；이침적암자화솔화천연잉여자화강도상대교약。일방면，물성차이위이용중자측량개전부면지각결구적반연여연구전정료기출；령일방면，저사물성삼수위상관지구물리측량수거적반연여해석제공료중요약속。
To well understand the deep structure environment and mechanism of strong earthquakes occurred in the Tianshan-Mongolia-Lake Baikal seismic belt, an integrated geomagnetic and gravity survey was conducted along the profile from Suhbaatar to Ulaanbaatar to Dalandzadgad in Mongolia. In this paper, petrophysical parameters ( bulk density, magnetic susceptibility, intensity of natural rema-nent magnetization, and K?enigsberger ratio) of 585 rock samples collected from this profile are summarized. Results indicate that sig-nificant density contrast of different rocks would result in variable gravity anomalies along the profile. Magnetic susceptibility and natural remanent magnetization of all rocks are variable, covering 3~5 orders of magnitude, which would make a variable induced magnetiza-tion and further links to complex magnetic anomalies in ground surface. These petrophysical parameters provide essential constraints on the interpretation of geophysical data and to calibrate geophysical parameters.